Parts List 6421-2 Page 2
Flame supervision detector location
Flame supervision detector location
¾ " pipe plugs (2)
¾ " pipe plugs (2)
Observation port or Pilot
Observation port or Pilot
Observation port or Pilot
Observation port or Pilot
6421-7-A, -7-B, -8-A
6421-4, -5, -6
A
Tile retaining rods
Tile retaining rods
A
Backplate fastener
Main air flange gasket
Main air flange Main air flange gasket
Backplate fastener adapter Body
Swing bolt with knob (4)
Cap screws (6)
Main air flange
Backplate
Section A-A
Burner designation
Part name
6421-4
6421-5
6421-6
6421-7-A
6421-7-B
6421-8-A
Backplate
3-4765-3
3-4765-3
3-4765-3
3-4826-2 4-13701-1 4-13698-1 3-4822-1
3-4826-2 4-13701-1 4-13698-1 3-4822-1
3-4826-2 4-13701-1 4-13698-1 3-4822-1
Backplate Fastener
– –
– –
– –
Backplate Fastener Adapter
Body
3-4764-5
3-4764-6
3-4764-6
Knob (4 req'd.)
3-6827-1
3-6827-1
3-6827-1
–
–
–
8765-8 7-D
Main Air Flange
4-1695-2 4-5371-2 8790-0 3-6492-2
4-1695-3 4-5371-2
4-1695-9 4-5371-2
8765-7-D 4-5371-3
8765-7-D 4-5371-3
Main Air Flange Gasket Observation Port Swing Bolt (4 req'd.)
4-5371-3 8790-0
8790-0
8790-0
8790-0
8790-0
3-6492-2
3-6492-2
–
–
–
Tile Retaining Rods
3-1115-2
3-1115-2
3-1115-2
3-1115-2
3-1115-2
3-1115-2
(4 req'd.)
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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